Slotted sewing-machine needle.



No. 806,840. PATENTED DEG.12,1905. s. P. RICHARDSON.

SLOTTBD SEWING MACHINE NEEDLE.

APPLICATION FILED 00123, 1904.

32 6 11 011140 M 4 gawu M UNITED STATES PATENT OFFICE.

SAMUEL FRANCIS RICHARDSON, OF ALCESTER, ENGLAND, ASSIGNOR TO GEORGE A. MANWARING, OF BAYONNE, NEW JERSEY.

SLOTTED SEWING-MACHINE NEEDLE.

Specification of Letters Patent.

Patented Dec. 12, 1905.

Application filed October 3, 1904. Serial No. 2263201.

1'0 all whom, it may concern:

Be it known that I, SAMUEL FRANCIS RICH- ARDSON, needle manufacturer, a subject of the King of Great Britain, residing at Alcester, in the county of Warwick, England, have invented certain new and useful Improvements in Slotted Sewing-Machine Needles; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being bad to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

My invention relates to improvements in sewing-machine needles; and the object of my invention is to provide a needle into the eye of which a thread can be placed through the side of the needle. I attain this object by means of the details of construction illustrated in the accompanying drawings, in which Figure 1 is a front elevation of a needle embodying my invention. Fig. 3 is a side view of the needle illustrated in Fig. 1; Fig. 2, section-lined portion, shows a cross-section on line R R of the needle shown in Fig. 1.

Similar letters of reference refer to similar parts throughout the severalviews.

Referring to the drawings, A designates the body portion or sewing portion of a sewingmachine needle. B designates the shank part of the same needle, said part being variously and suitably formed to fit the needle-bar of various makes of sewing-machines in the ordinary manner. 0 shows the eye of said needle. D D show an enlargement of the body portion A opposite, above, and below the eye C.

S shows a slot through one side of the needle into the eye C.

E and F show the upper and lower lips or tongie formed by cutting the slot S into the eye G and H show the upper and lower limits of the eye C.

J shows the short thread-groove usually found on one side of machine-needles.

J J show in dotted line the front view of thread-slot J.

J J show in dotted lines the long threadgroove usually found in machine-needles for purposes well known in the art.

The dotted line K K designates the longitudinal axis of the thread-groove, which may or may not be parallel to the longitudinal axis of the needle.

The dotted line L L designates the longitudinal axis of the needle-eye C.

M M designate the upper limit of the rounding off of the upper lip in front of the eye G, showing by means of line M E M said lip to be approximately rounded to a parabolical form.

N designates the lower limit of the rounding off of the lower lip in front of the needleeye C.

O designates the back wall of the eye (1.

P designates the front wall of the eye 0.

The operation of threading my needle is as follows: The thread is held taut across the front or slot side of the needle, moving it then in the direction of its thickness straight down or forward until the slot is reached, when by a slight pull and a side-to-side motion across the slot the thread slips through the slot into place in the eye C.

To keep the goods being sewed from catching in the slot and for purposes of strength, the needle is made larger in the slotted part, thus giving metal enough to permit of the slot without unduly weakening the needle and to round off the front edges of said slot.

In order to secure as much strength as possible, the eye 0 is punched into the needle nearer the front than the back of the body portion, thus bringing the longitudinal axis of the eye C (said axis being shown by the line L L) between the longitudinal axis of the body portion of the needle K K and the front or slotted side of the needle.

The body portion of the needle between the points D D is practically of a uniform elliptical cross-section, so that a line drawn parallel to the longitudinal axis of the needle on the surface of said needle would be a straight line, except for the break caused by the slot, should it be drawn on that part of the needle that is slotted.

The particular features of my invention consist in the details of construction whereby the needle is strengthened by placing the eye well toward the front of the needle in an enlarged portion thereof, and the catching of the goods in the slot is prevented by the long rounding off of the upper lip above the slot in connection with the straight back of the needle opposite to the slot between the points D D, Fig. 3.

In the construction of my needle I am particularly careful to avoid any protuberances or enlargements immediately above or below the eye or contiguous thereto, so that in my device the needle is approximately and practically of the same diameter immediately above and below the slot as it is at the slot.

Having described my invention, What I claim as new, and desire to secure by Letters Patent, is

1. An open-eyed sewing-machine needle having a slotted portion an enlarged body portion a straight back opposite the eye, said enlargement being at the eye and immediately contiguous thereto, and a tapered lip on one side of the slot.

2. An open-eyed sewing-machine needle SAMUEL FRANCIS X RICHARDSON.

mark Witnesses:

MARSHALL ALLWooD, NORMAN ALLwooD. 

